Are you tired of waiting for spring to bloom? Snowed in for yet another weekend? You can find a surprising number of creatures without leaving the comfort of your home. Just how comfortable you will be after your indoor discoveries is another question, but most of your home's biodiversity will be benign.
Before you begin your indoor expedition, you might want to read Rob Dunn's Never Home Alone. The book is an excellent primer for a home bioblitz (inventory of a given taxon of organisms in a short period of time). It can give you a good idea of what to expect, and calm any potential fears. Indeed, the thesis of Never Home Alone is that the more biodiversity in your household, the better. At the end of the day you will be discarding pest control products and harsh cleaning agents....or buying more.
Instead of being embarrassed by the cobweb in the corner, recognize the industrious nature of its maker. Compliment yourself for preserving a living pest control agent. See if you can find evidence of the insect victims the spider has trapped. Examine any shed exoskeletons to help you identify the spider itself if the living arachnid is not present. Dusty webs, unable to snare prey any longer, can be safely cleaned. Spiders will change "web sites" if they go long periods without success.
Don't forget to check your pantry. You may need a snack midway through your hunt anyway, but flour, rice, and other grains may hold unexpected insect surprises. Drugstore Beetles, Cigarette Beetles, Meal Moths, and spider beetles may be feasting on neglected stored products of vegetable origin. Dry animal-based foods can attract the Larder Beetle and carpet beetles, all members of the family Dermestidae. The wool garments in your wardrobe, and wool blankets, furs (but you have faux furs, no?), and silks are vulnerable to clothes moths and carpet beetle larvae, too. Try storing them in a cedar chest when you are not using them regularly. Cedar has proven repellent qualities and is not toxic to people or pets.
One of the most rewarding sources of insect diversity is a light fixture. The other day, one of our bulbs burned out and it gave me an excuse to see what insects had found their way into our home over the past several months. In our case, because we actively blacklight for moths in the backyard, we inevitably carry other tiny insects back inside after the night is over, so we might have a greater diversity of fauna than average, but probably not.
You may not want to wait for a light bulb to expire before you examine a ceiling fixture or lamp, though. These days, the lifespan of the new generation of electrical bulbs is ridiculously long. It can be years before you have to install a new one. Further, insect specimens quickly die in the hot, dry conditions, become brittle, are eaten by carpet beetle larvae, and gather dust that makes them difficult to identify later. Best to check the lights often.
Last, but certainly not least, you will want to inspect for bed bugs. Adult bed bugs are small, no larger than the average apple seed. Immature stages are smaller still, some nearly transparent. You will likely see other signs of bed bugs before encountering the insects themselves, though. Should you find some, resist the temptation to blame your spouse, roommate, visiting guest, or tenants of the nextdoor apartment. Some authorities believe that one out of every four U.S. residences has bed bugs or will have them. Cimex lectularius thankfully poses no health threats that modern science is aware of. The biggest problems still stem from litigation over infestations, and the costs of eradication in a given dwelling.
Our home list of domiciliary creatures, including people and pets present and past, is approximately forty (40), over the last seven years or so. Clearly, we have more work to do. We do take comfort in the notion that we are providing homes for a broad spectrum of creatures, the great majority of which enhance our lives rather than detract from them.
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